Drill.



No. 69!,486. Patented Jan. 2|,"|902. W. M. POTTER.

DRILL.

(Application filed May 21, 1900.) (No Model.)

K v I I [N VEN TOR WITNESSES UNITED STATES PATENT OFFICE.

\VILLIAM M. POTTER, OF SYRACUSE, NEW YORK, ASSIGNOR TO E. C. STEARNS dz C O., OF SYRACUSE, NEW YORK.

DRILL.

SPECIFICATION forming part of Letters Patent No. 691,486, dated January 21, 1902.

Application filed May 21, 1900- Serial No. 17,433. (No model.)

To all whom it may concern:

Be it known that I, WILLIAM 1W1. POTTER, of Syracuse, in the county of Onondaga, in the State of New York, have invented new and useful Improvements in Drills, of which the following, taken in connection with the accompanying drawings, is a full, clear, and exact description.

My invention relates to a hand-drill operating on a new principle to effect the feed and withdraw the drill from the Work.

My invention is clearly shown in the accompanying drawings, in which Figure I is a side elevation of the complete drill. Fig. II is an enlarged vertical section of the new parts. Fig. III is a further enlarged isometric view,partly in section, showing the upper end of the hand-wheel shaft and the lower end of the balance-wheel shaft separated, with the operative roller and adjacent parts. Fig. IV is a smaller elevation of substantially the same parts, portions being shown in section. Fig. V isasection on line V V of Fig. II looking up; Fig. VI, a similar section looking down. Fig. VII is a side elevation of the pinion, sleeve, lower end of the hand-wheel shaft, upper end of chuck-shaft, and rod separated.

In the figures, 1 indicates the frame, of any suitable construction, provided with usual flanges 2 2, on which slides the bed 3, carried on vertically-adjustable support 4, fitted to flanges and ratchet 5 and provided with thumb-screws 6 and 7.

8 is the lower arm of the frame, to whichis fitted the sleeve 9, carrying the pinion 10, with which meshes gear 13 on shaft 14, turned by crank 15, 16 being the set-screw. Chuck 18 for the tool is carried on lower end of shaft 19, fitting sleeve 9 and connected to rotate therewith by feather 20 and corresponding spline. On the upper end of this shaft is carried the rod 21, threaded at its upper end 22, to which is fitted the thumb-screw 23 for adjusting the tension of spring 24, by which the parts are held in position and the operation and feed of the drill are maintained.

30 is the balance-wheel on the balancewheel hub 31, having the protecting-margin 32 and rotatably connected to rod 21 by feather 33 and corresponding spline. At the lower end of the hub within the margin is the notch 34, forming a socket for the operative roller 35, which effects the feed by engaging with the cam-surface 40 on the upper end of the hand-wheel shaft 41, provided with a handwheel42, a smooth lower end 43, and a threaded shank 44, fitting corresponding thread on arm 45.

46 is a set-screw to engage with tip 43 and prevent rotation of the shaft when desired.

The operation of my drill is as follows: By the crank motion is communicated to the pinion, the sleeve, the chuck-shaft, rotating the tool at the same time to the rod, thence to the balance-wheel hub, in whose notch is carried the small roller, which being thus forced around against the cam-face of the upper end of the hand-Wheel shaft in the direction indicated by the arrow in Fig. III rotates sai'd shaft, which forces shaft 19 down and feeds the drill steadilyand positively, the feed thus being communicated to the drill in a peculiar way by its own rotation. \Vhen it is desired to withdraw the drill, the motionof the crank is reversed, by which the roller is carried back, immediately engaging with the vertical portion 50 of the camsurface and at once turning the drill back into original position. Duringthis backward turn the parts are moved vertically and the screw-threaded shank of the hand-Wheel shaft turned upin its supporting-arm until its smooth portion is reached, when it revolves there Without further vertical movement. WVhen it is desired to use the drill withoutthe feed, set-screw 46 is set up, preventing rotation and downward movement of hand-wheel shaft.

As will be seen, my drill is of simple and cheap construction, easily and steadily operated, quickly thrown in and out of operative position, and used either as a feed-drill or not by the simple turning of a set-screw. It may be called a self-feeder and a self-return drill, for the roller carried looselybut socurely in the notch engages with the camsurface of the hand-wheel shaft, rotating it in the upper arm by friction down against the chuck-shaft when roller is traveling in the direction of arrow in Fig. III. When rotation wall 50 of cam-surface 40 and rotates chuckshaft rapidly to withdraw tool.

Having thus fully described my invention, what I claim, and desire to secure by Letters Patent, is-- 1. In combination in a drill, a supportingframe, a rotating chuck-shaft suitably supported thereon having a chuck for the tool at its lower end and an upwardly-extending red at its upper, means for rotating said shaft, a tubular shaft strung on said rod supported in the arm of the frame, a hub arranged above said tubular shaft and rotatably connected to the chuck-shaft, means for supporting the weight of the chuck-shaft on said hub, the lower end of said hub and the upper end of the tubular shaft being formed with cam-surfaces, which engage and force said tubular shaft down to feed the chuckshaft and tool when said hub is rotated.

2. In combination in adrill, asuitablesupporting-frame, a standard for the Work carried thereon, a chuck-shaft rotatably sup ported in the frame having a chuck for the tool at its lower end and an upwardly-extending rod at its upper, means for rotating said shaft, a hub strung on said rod and connected to rotate therewith, a spring engaging with the upper surface of said hub to support the chuck-shaft thereon, a tubular shaft also strung on said rod between the chuck-shaft and the hub and formed with a thread fitting a corresponding thread in the arm of the frame, a roller interposed between the upper surface of said tubular shaft and the tubular surface of the hub to engage with a cam-surface formed on one, andforce the tubular shaft down by frictional contact.

3. In combination in a drill, a suitable supporting-frame, a standard for the work carried thereon, a rotating sleeve and pinion suitably supported thereon, a crank and gear rotatably supported thereon and engaging with said pinion, a chuck-shafthaving a chuck on its lower end and an upwardly-extending rod on its upper, connected to rotate therewith said sleeve, a hub strung on said rod and connected to rotate therewith, a nut on the upper porting-frame, a standard carried thereon for the work, a sleeve and integral pinion rotatably supported thereon, a crank and gear journaled on the frame and engaging with said pinion, a chuck-shaft carrying the chuck for the tool on its lower, and an upwardly-extending rod on its upper end fitted to slide within said sleeve and connected to rotate therewith by feather and spline, a hub strung on said rod and connected to rotate therewith by the feather and corresponding spline, a nut fitted to the upper end of said rod, a spiral spring strung on said rod between said nut and hub to elastically support the weight of said chuck-shaft and chuck on said hub, a tubular shaft strung on said rod between the chuckshaft and hub formed on its exterior with a thread fitted to a corresponding thread in the frame, said hub being formed with a notch on its lower surface and an antifriction-roller fitted to said notch and adapted to engage with a cam-surface on the upper end of said tubular shaft,grad ually to rotate the tubular shaft and feed the chuck-shaft and tool, when turned in one direction.

5. In a drill, the combination with the frame and the tool, of the tool-support, means supported on the frame for rotating the tool and tool-support, a threaded shank fitting a corresponding thread in the frame and engaging with the tool-support, a hub connected to rotate with the tool-support, an operating-roller retained in position by said hub and adapted to engage when rotated in one direction with the inclined portion of a cam-surface on the threaded shank,and when rotated in the other direction with the vertical portion of said camsurface on the threaded shank.

6. In a drill, the combination with the frame and the tool of the tool-support, an upwardlyextending rod on said support, means for rotating the tool-support and said rod, a hollow shank fitting said rod and externally threaded to fit a thread in the frame, said hollow shank being formed on its upper end with an inclined cam-surface having a vertical portion, a hub connected to rotate with the toolsupport and having a notch on its lowerend, an operating-roller arranged in said notch and engaging with said cam-surface, and a spring arranged between the nut on the rod and the upper end of the hub.

In testimony whereof I have hereunto signed my name.

WILLIAM M. POTTER.

Witnesses:

(J. O. ScHoENEcK, M. T. BROWNELL. 

